Multi-layer negative electrode with different binder content and different particle size of active material in each layer and lithium secondary battery comprising the same
US-2019027740-A1 · Jan 24, 2019 · US
Electrode and lithium secondary battery comprising same
US2022109143A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022109143-A1 |
| Application number | US-202017424148-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 31, 2020 |
| Priority date | Feb 1, 2019 |
| Publication date | Apr 7, 2022 |
| Grant date | — |
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Abstract
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Provided an electrode for secondary batteries, the electrode including: a substrate; and a plurality of active material layers arranged on the substrate and each including an active material, wherein at least one of the plurality of active material layers includes a binder, and a content of the binder is about 1.0 part by weight to about 1.7 parts by weight based on 100 parts by weight of a total weight of the plurality of active material layers.
First claim
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1 . An electrode for secondary batteries, the electrode comprising: a substrate; and a plurality of active material layers arranged on the substrate and each including an active material, wherein at least one of the plurality of active material layers includes a binder, and a content of the binder is about 1.0 part by weight to about 1.7 parts by weight based on 100 parts by weight of a total weight of the plurality of active material layers. 2 . The electrode of claim 1 , wherein any one of the plurality of active material layers includes the binder, and others thereof do not include the binder, or each of the plurality of active material layers includes a binder having a different content. 3 . The electrode of claim 1 , wherein the binder is non-uniformly distributed in the active material layer. 4 . The electrode of claim 1 , wherein the substrate includes a conductive substrate, and the binder has a concentration gradient that decreases as a distance from the substrate increases. 5 . The electrode of claim 1 , wherein the plurality of active material layers include a first active material layer and a second active material layer, the second active material layer is disposed between the substrate and the first active material layer, and the second active material layer includes a second binder. 6 . The electrode of claim 5 , wherein the first active material layer and the second active material layer include a binder in a weight ratio more than 5:5 and 0:10 or less. 7 . The electrode of claim 6 , wherein the first active material layer and the second active material layer include a binder in a weight ratio of more than 5:5 and 1:9 or less. 8 . The electrode of claim 5 , wherein a content of the second binder is 1 part by weight to 3 parts by weight based on 100 parts by weight of a total weight of the total second active material layer. 9 . The electrode of claim 5 , wherein each of the thicknesses of the first active material layer and the second active material layer is 60 μm to 210 μm, and the thicknesses of the first active material layer and the second active material layer are the same or different. 10 . The electrode of claim 5 , wherein the thickness of the first active material layer is 100 μm to 210 μm, and the thickness of the second active material layer is 60 μm to 150 μm. 11 . The electrode of claim 5 , wherein a thickness ratio of the first active material layer and the second active material layer is 7:3 to 5:5. 12 . A secondary battery comprising the electrode of claim 1 .
Assignees
Inventors
Classifications
by coating on electrode collectors · CPC title
of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title
Binders · CPC title
being polymers · CPC title
Positive electrodes · CPC title
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- What does patent US2022109143A1 cover?
- Provided an electrode for secondary batteries, the electrode including: a substrate; and a plurality of active material layers arranged on the substrate and each including an active material, wherein at least one of the plurality of active material layers includes a binder, and a content of the binder is about 1.0 part by weight to about 1.7 parts by weight based on 100 parts by weight of a tot…
- Who is the assignee on this patent?
- Samsung Sdi Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Apr 07 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).